#!/usr/bin/perl
# $OpenBSD: retrieve-index,v 1.3 2017/02/23 14:24:13 espie Exp $
# Copyright (c) 2000
# Marc Espie.  All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Neither the name of OpenBSD nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY ITS AUTHOR AND THE OpenBSD project ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

# simple script to retrieve part of the INDEX
use strict;
use warnings;

my ($index, $iscategory, $ismaintainer, $iskey);
for (@ARGV) {
	$index = $' if m/^index\=/;
	$iscategory = $' if m/^category\=/;
	$ismaintainer = $' if m/^maintainer\=/;
	$iskey = $' if m/^key\=/;
}

die "No index" unless defined $index and -e $index;

open my $file, '<', $index or die "Can't open index: $index";

while (<$file>) {
	chomp;
	my ($key, $subdir, $maintainer, $category) = (split(/\|/, $_) )[0, 1, 5, 6];
	$maintainer =~ s/\@.*//;
	next if defined($ismaintainer) && $maintainer !~ m/$ismaintainer/;
	next if defined($iscategory) && $category !~ m/$iscategory/;
	next if defined($iskey) && $key !~ m/$iskey/;
	print $subdir, " ";
}
